1. Scope

book Electric vehicle helmet The manufacturer's standard uses motorcycle passenger helmet as the base wood structure, type and specification, technical requirements, inspection methods and inspection rules of electric vehicle helmet.

This electric vehicle helmet manufacturer standard is used for helmets worn by electric vehicle helmet drivers and passengers (passengers for short).

2 Reference standards

The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When the standard is published, the versions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest version of the following standards.

GB 10000-88 Human Dimensions of Chinese Adults

3. Definitions

The following definitions are adopted in this standard.

3.1 Electric vehicle helmet (hereinafter referred to as helmet)

A device for protecting the head of electric vehicle passengers.

3.2 Housing

The outer structure of the helmet.

3.3 Buffer layer

Fit cushion to absorb impact energy.

3.4 Comfort pad

Ensure that the head is fitted with comfortable padding.

3.5 Wearing device

The part that ensures that the helmet is firmly worn on the head.

3.6 Goggles

Eye and face protection parts that block the eye and face without affecting the observation.

3.7 Transmittance of goggles

The ratio of the luminous flux of visible light through goggles to the incident luminous flux.

3.8 Full Helmet

It means that the shell and buffer layer can cover the protection area and protect the eyes, face and jaw. A helmet whose shell and jaw protection parts are an integral structure.

3.9 Half helmet

It refers to the helmet whose shell and buffer layer can cover the protected area.

3.10 Foundation plane

The horizontal plane determined by the left and right tragus points and the right infraorbital point, also known as the head horizontal plane, is the O-O 'plane in Figure 1.

3.11 Reference plane

The plane at a certain distance above the foundation plane, which is determined by the head model, see Figure 2 and Table 1.3 12 Test head type (hereinafter referred to as head type)

A head model that simulates the shape and mechanical properties of the human head when testing helmets. 3.13 Test area

The inspection scope of the helmet is the A-A 'and above parts in Figure 2. Z-Z 'is the central vertical axis.